I've been thinking about this. It would take a huge donor or donors (Elon and friends?) to create and fund a viable 3rd party. Preferably, one that is in the middle - not always right or left on every issue, which I believe is where a large number of people reside. However, I also believe there are plenty of voters in both parties who feel their party no longer reflects a majority of their views. If a third part would gain enough ground to compel both of the other parties to compromise we might actually see legislation come from Washington that is good for the country and not just for a political party. We may also see the slow dismantling of the Deep State as both parties would have to woo the middle party (let's go with The Federalist Party for grins) in order to get anything passed.
I won't vote for a Democrat for a national seat but the Republican party doesn't always speak for me, either. I'm not far right (or left) on every single issue. Elon Musk and RFK, Jr don't seem to be, either. A third party would ultimately strengthen this country, imo.